Similarly, in another longitudinal study on depression by Rigonatti et al (2008), serial applications of anodal (stimulatory) tDCS applied to the prefrontal cortex (10 sessions of 2 mA each) had a similar effect on reducing depressive symptoms as measured by Beck Depression Inventory scores as fluoxetine even 6 weeks after treatment. However, the effects of tDCS were more immediate than that of fluoxetine19.